199832888657 has 2 divisors, whose sum is σ = 199832888658. Its totient is φ = 199832888656.

The previous prime is 199832888641. The next prime is 199832888669. The reversal of 199832888657 is 756888238991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199236356881 + 596531776 = 446359^2 + 24424^2 .

It is an emirp because it is prime and its reverse (756888238991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199832888657 - 2⁴ = 199832888641 is a prime.

It is not a weakly prime, because it can be changed into another prime (199832888677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99916444328 + 99916444329.

It is an arithmetic number, because the mean of its divisors is an integer number (99916444329).

Almost surely, 2^199832888657 is an apocalyptic number.

It is an amenable number.

199832888657 is a deficient number, since it is larger than the sum of its proper divisors (1).

199832888657 is an equidigital number, since it uses as much as digits as its factorization.

199832888657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 418037760, while the sum is 74.

The spelling of 199832888657 in words is "one hundred ninety-nine billion, eight hundred thirty-two million, eight hundred eighty-eight thousand, six hundred fifty-seven".